Merge "Fix comparison between signed and unsigned error on darwin" into mnc-dev

      << errno;

  struct stat sb;

  ASSERT_EQ(0, stat(tf.filename, &sb));

  ASSERT_EQ(0660U, (sb.st_mode & ~S_IFMT));

  ASSERT_EQ(0660U, static_cast<unsigned int>(sb.st_mode & ~S_IFMT));

  ASSERT_EQ(getuid(), sb.st_uid);

  ASSERT_EQ(getgid(), sb.st_gid);

  std::string s;